Glaucoma Angle closure glaucoma 2012-09-10T05:22:48Z SNOMEDCT_US:392288006 UMLS:C0017606 Closed-angle glaucoma Primary angle closure glaucoma Evidence of optic nerve damage can include s optic disc abnormalities (Vertical cup:disk ratio over the 97. 5th percentile in the normal population), visual field defects. The role of increased intraocular pressure (IOP) in glaucoma is debated, but an IOP exceeding the 99. 5th percentile of the normal population may be considered to support the diagnosis. Narrow angle glaucoma A type of glaucomatous optic neuropathy in an eye that has evidence of angle closure (i.e. significant iridotrabecular contact). HP:0032119 HP:0012109